// Copyright 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_RENDERER_STATS_COLLECTION_CONTROLLER_H_
#define CONTENT_RENDERER_STATS_COLLECTION_CONTROLLER_H_

#include "base/macros.h"
#include "gin/wrappable.h"

namespace blink {
class WebFrame;
}

namespace content {

// This class is exposed in JS as window.statsCollectionController and provides
// functionality to read out statistics from the browser.
// Its use must be enabled specifically via the
// --enable-stats-collection-bindings command line flag.
class StatsCollectionController
    : public gin::Wrappable<StatsCollectionController> {
public:
    static gin::WrapperInfo kWrapperInfo;

    static void Install(blink::WebFrame* frame);

private:
    StatsCollectionController();
    ~StatsCollectionController() override;

    // gin::WrappableBase
    gin::ObjectTemplateBuilder GetObjectTemplateBuilder(
        v8::Isolate* isolate) override;

    // Retrieves a histogram and returns a JSON representation of it.
    std::string GetHistogram(const std::string& histogram_name);

    // Retrieves a histogram from the browser process and returns a JSON
    // representation of it.
    std::string GetBrowserHistogram(const std::string& histogram_name);

    // Returns JSON representation of tab timing information for the current tab.
    std::string GetTabLoadTiming();

    DISALLOW_COPY_AND_ASSIGN(StatsCollectionController);
};

} // namespace content

#endif // CONTENT_RENDERER_STATS_COLLECTION_CONTROLLER_H_
